HBase 0.20.0 is available for download:
http://hadoop.apache.org/hbase/releases.html
The Release Notes are available here: http://su.pr/2sjrkf
This HBase is faster, slimmer, sweeter smelling, and more robust than
previous versions. We recommend that all upgrade to this release.
HBase 0.20.0 runs on Hadoop 0.20.0. A lot has changed since 0.19.x
including configuration fundamentals. Be sure to read the 'Getting Started'
documentation:
http://hadoop.apache.org/hbase/docs/r0.20.0/api/overview-summary.html#overview_description
If you wish to bring your 0.19.x hbase data forward to 0.20.0, you will need
to run a migration. See http://wiki.apache.org/hadoop/Hbase/HowToMigrate.
First read the overview and then go to the section, 'From 0.19.x to 0.20.x'.
Thanks to all who contributed to this release
Yours,
The HBasistas
P.S. 0.20.0 Highlights include:
+ Much improved performance
+ Master is no longer SPOF
+ Rolling restarts -- no need to take down whole cluster updating config. or
making minor upgrades
+ A new, more comprehensive API (The old API is still present but
deprecated)
+ Improved mapreduce connectors updated to suit Hadoop 0.20.0 new mapreduce
API
+ New contrib package with updated Transactional HBase (THBase) and Indexed
HBase (ITHBase) as well as a new REST gateway called stargate
+ And, as they say on the radio, "much, much more".